Portion of a display having a graphical user interface



FIG. 1 is a front view of a first embodiment of a portion of a display having a graphical user interface showing our new design;

FIG. 2 is a front view of a second embodiment of a portion of a display having a graphical user interface showing our new design; and,

FIG. 3 is a front view of a third embodiment of a portion of a display having a graphical user interface showing our new design.

The outermost broken lines illustrate the portion of a display screen, and the dot-dash broken lines in FIGS. 1-3 illustrate an innermost boundary of the claimed design. Additional broken lines in FIGS. 1, and 3 illustrate portions of the graphical user interface. None of the broken lines form part of the claimed design. 

CLAIM The ornamental design for a portion of a display having a graphical user interface, as shown and described. 